Tubular lantern.



G.L.BETTS.

TUBULAR LANTERN. APPLIUATION FILED JULY 2,1906.

Patented Feb. 2, 1909.

71 coco 60o Win/asses 8. 6L. Uo-Q.

UNITED STATES PATENT GFFICE.

CHARLES L. BETTS, OF NEW YORK, N. Y., ASSIGNOR TO B. E. DIETZ COMPANY, OF NEW YORK, N. Y.

TUBULAR LANTERN.

I New York, borough of Brooklyn, in the county of Kings and State of New York,

have invented a new and useful Improvement in Tubular Lanterns, of which the following is a specification.

This invention relates to that class of tubular lanterns and lamps in which the products of combustion are discharged through a metallic chimney which rests on the globe and which is surrounded by an air inlet chamber from which the air tubes extend downwardly to the air chamber below the burner. This air inlet chamber is supplied in this class of lanterns mainly with fresh air from the outside and only to a limited extent from the interior of the chimney with air which has passed through the globe and which is heated and mixed with products of combustion.

The object of my invention is to increase the injection of air from the interior of the chimney into the surrounding air inlet chamber with a view of reducing the liability of the lantern to smoke and of improving the brilliancy and steadiness of the flame under the varying conditions of movement and exposure to air currents to which lanterns are subjected in use.

In the accompanying drawings Figure 1 is a sectional elevation of a lantern top provided with my improvements. Fig. 2 is a side elevation thereof. Fig. 3 is a top plan view, partly in a horizontal section, in line 33, Fig. 1. Fig. 4; is a diagrammatic sectional elevation of one side of the lantern top.

Like letters of reference refer to like parts in the several figures.-

A represents the globe of a tubular lamp or lantern, B the metallic chimney resting thereon and comprising, preferably, a lower enlarged part 1, a contracted waist part 2 and an upper enlarged cap 3 having peripheral openings 4 for the escape of the products of combustion. C represents the annular air inlet chamber which surrounds the chimney and in which the latter is vertically movable so that it can be raised against the pressure of a spring D for releasing the globe, the pressure of the spring holding the globe in position in the lamp or lantern in the usual way. The air cham- Specification of Letters Patent.

Application filed July 2, 1906.

Patented Feb. 2, 1909.

Serial No. 3%,420.

ber is provided at the top with a horizontal shoulder 5 which closes the top of the air chamber and against which the spring D abuts and on which the chimney bears in its lowermost position by its shoulder 6. E represents the air tubes, one or more according to the style of the lamp or lantern, connected to the peripheral wall of the air inlet chamber C and extending downwardly therefrom in the usual manner. F represents the horizontal deflecting disk arranged below the air chamber and around the lower portion 1 of the chimney from which the disk is separated by an annular air inlet passage 7. This disk is preferably carried by legs 8 extending downwardly from the peripheral wall of the air chamber and forming air inlet openings 9 between the disk and the lower edge of the air chamber. All of these parts may be of any usual or suitable construction.

The chimney is provided on its inner side with a deflector U preferably an annular flange or shoulder, which projects inwardly from the cylindrical wall of the chimney into the path of the column of heated air which flows upwardly through the chimney. The latter is provided below this deflector with openings 10 for the passage of air from the chimney into the surrounding'air inlet chamber. The current of heated air which flows upwardly along the inner surface of the chimney is checked and deflected by the internal deflector G and is in part directed outwardly through the openings 10 into the surrounding air inlet chamber. The latter is by this means supplied with a considerable portion of heated air from the interior of the chimney, which is the greater the greater the upward draft through the chimney, and the air supply currents are more evenly balanced within the lantern, whereby the liability of the lantern to smoke under certain conditions of movement and exposure to the wind is greatly reduced, if not absolutely avoided, while the brilliancy and steadiness of the flame is greatly increased. The air outlet openings 10 are preferably arranged, as shown, on a level which is near the lower edges of the mouths of the air tubes, so that the air which is deflected outwardly through these openings is not injected directly into the mouths of the tubes but is diffused more or less in the air chamber.

The chimney is also preferably provided near its lower edge with the usual ventilating openings 11.

The internal deflector G of the chimney is preferably composed of an inwardly projecting flange 12 formed on the lower edge of the contracted waist portion 2 of the chimney, and an inwardly projecting flange 13 formed on the upper edge of the lower portion 1 of the chimney and bent around and closed against the flange 12 of the waist por tion. The flange 13 also forms the external shoulder of the chimney against which the lower end of the spring I) bears by which the chimney is pressed against the globe.

I claim as my invention:

1. In a lamp or lantern, the combination of an air inlet chamber, an air tube connected therewith, and a chimney arranged in said chamber and having an upper contracted portion, the upper and lower portions of the chimney forming at their unction an external shoulder and an inwardly projecting deflector, and the lower portion of the chimney being provided with air openings which are arranged below said deflector and above the bottom of said air inlet chamber, substantially as set forth.

2. In a lamp or lantern, the combination CHARLES L. BETTS. Witnesses OSCAR WVARNER, A. E. LUERSSEN. 

